Mining-machine.



C. E. DAVIS.

MINING MACHINE.

APPLICATION FILED MAYIO. 191s. RENEWED IAN-1.1918.

1,274,516. Patented Aug. 6, 191&-

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his 027% DAVIS.

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MINING MACHINE.

APPLICATION FILED MAY I0. I915- RENEWED IAN- 7. I9l8.

Patented Aug. 6, 1918.

3 SHEETS-SHEET 2 c. DAVIS.

MINING MACHINE.

APPLICATION FILED MAY10.19I5- RENEWED JAN. 7,1918.

Patented Aug. 6, 1918.

3 SHEETS-SHEET 3 UNITED STATES PATEN T OFFICE.

CHARLES E. DAVIS, OF CHICAGO, ILLINOIS, ASSIGNOR T0 GOODMANMANUFACTURING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

MININGMACHINE.

Specification of Letters Patent.

Patented Aug. 6, 1918.

Application filed May 10, 1915, Serial No. 26,990. Renewed January 7,1918. Serial No. 210,771.

To all whom it may concern:

Be it known that I, CHARLES E. DAVIS, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented a certain new and useful Improvement in Mining-Machines,ofwhich the following is a specification.

This invention relates to mining machines and has for its object toprovide an electric system of control therefor.

The invention is illustrated in the accompanying drawings, whereinFigure 1 is a diagrammatic view showing the mining machine in operation;

Fig. 2 is a vertical section view through one form of mining machine inconnection with which the invention is used;

Fig. 3 is a plan view with parts omitted, of the machine shown in Fig.2;

Fig. 4 is a sectional view taken on line 44 of Fig. 3;

Fig. 5 is a diagrammatic view showing the electric circuits.

Like numerals refer to like parts through out the several figures.

As illustrated in the drawing, the mining machine is provided with amain frame 1, mounted upon wheels 2, a supporting frame 3 is mounted onthe main frame and is connected therewith. The supporting frame 3 isarranged so that it may be moved longitudinally and laterally withrelation to the main frame. As herein shown, it is pivoted to a toothpart or wheel 4 by means of a pivot 5. Part 4 is rotatably mounted uponthe shaft 6 connected with the main frame 1. A flexible belt 7 engagesthe toothed part 4 and is driven by a driving wheel 8 fastened to ashaft 9. This shaft is provided with a worm wheel 10, which engages aworm 11 on a shaft 12, said latter shaft being connected with thefeeding motor. This connection may be made in any desired manner. Asherein shown, the shaft 12 is provided with a gear 13 loosely mountedthereon, which engages a gear 14 on the armature shaft of the motor 15.A sliding clutch member 16 on tlf'eshaft 12 connects and disconnects thegear 13 and the shaft 12. Connected with the toothed part 4 is a toothedpart 4. A flexible belt 4 engages said toothed part and is connectedwith a pin or pivot 4, the two ends being connected to said pivot asshown in Fig. 3. This pivot works in a guideway 4. The pivot 4 works ina guideway 4 in the supporting frame. The gear 13 also engages a gear 17loosely mounted on a shaft 17, the shaft and gear being connected anddisconnected by the sliding clutch member 18, the shaft 17 provided witha worm 19 which engages a worm wheel 20 on a shaft 21, carrying a drum22, about which a flexible cable .28 is wound. This flexible cablepasses around direction changing pulleys 24 on the supporting frame, andis adapted to be used for moving the machine forward to force the cutterarm into the coal in making the initial cut, and for moving it backwardto withdraw the cutter arm from the coal atthe end of the cut. The shaft25 of the motor 15 is provided with a bevel gear 26 loosely mountedthereon, and a sliding clutch member 27 con trolled by the handle 28 andadapted to engage a clutch member on the bevel gear so as to connect thegear and the shaft. The bevel gear 26 engages the bevel gear 29 on theshaft 30. which passes through the main frame 1. This shaft is providedbelow the main frame with a bevel gear 31, which engages a bevel gear 32on a shaft 33. The shaft 33 supplies the power for thefwheels 2 formoving the machine from place to place. As shown, this shaft is providedwith a sprocket wheel 34 and a flexible belt 35 which engages a sprocketwheel 36 on the axle 37. The other axle 38 is driven by a belt 39. Thesupporting frame 3 is'provided with the supports 40 provided with theracks 41. Between these supports is located a cutting element 42, whichis provided with pinions 43 at the sides thereof, said pinions engagingthe racks 41. The pinions 43 are on the shafts 44, said shafts beingdriven from the motor 45 through the bevel gears 46 and 47, the shaft48, the worm 49. the worm wheel 50, the shaft 51, worm and worm wheel52, said worms bemg located on the shaft 51. The cutting element isprovided with a cutting device,

which may be of any desired form and which is operated by the motor 45.As herein shown, this cutting device consists of a cutter arm 54,provided with a cutter chain driven by the sprocket wheel which in turnis driven through the bevel gears 46 by'the motor 45.

In the operation of the machine, the motor 45 is used to operate thecutting element. This requires a large amount of power and this motor isa comparatively large motor. The motor 15 is used to perform twofunctions. one to move the supporting frame 3 and the cutting element 42so as to force the cutter across the face of the coal as shown inFig. 1. During this operation the motor 15 must run at a comparativelyslow speed and develop a small horsepower. The motor 15 is also used tomove the entire machine from place to place by driving the wheels 2.During this operation the motor is required to develop a high horsepower. The resistance required to permit the motor to perform these twofunctions must necessarily be large and there is no place for it on themachine. This difficulty is overcome by providing a resistance for themotor 15, sufiicient to permit it to perform one of its functions, thatis, the function of feeding, and then arranging so that the resistanceused in connection with the large motor 45' can be also used with thesmall motor when it is performing its other function, that is, movingthe machine from place to place. I prefer also to provide means so thatwhen the machine is in operation cutting coal the motor 45 cannot bestopped while the motor 15 is running so as to cause the machine to feedwhen the cutter is not running, for under such conditions the machinewould be broken or the motor burned out.

In Fig. 5 I have shown a diagram of circuits for eliminating thesedifficulties. In this diagram when the motor 45 is running to actuatethe cutterit is controlled by the resistance 60. Vhen the motor 15acting in its capacity to move the supporting frame 3 so as to feed thecutter to the coal. the resistance 61 is used. Vhen the circuit throughthe motor 45 is first completed. all the resistance 60 is in circuit andthe circuit will be traced as follows: from the terminal 62 through thecrmductor 63 to the controller contact 64 of the controller 64. lVhenthe motor is first started up, the controller contact 65 is in contactwith the contact- 64, and hence the current passes to contact 65 andthen through contacts 66, 67, 68 and 69 to contact 70, which is then incontact with contact 71. The current then passes from contact 71 toconductor 72 to point 73. The current then passes by conductor 74 to theresistance 60 and thence through one section thereof and then byconductor 75 to the other section thereof and then by conductor 76 tothe reversing switch 77, thence through contacts 78, 79 and 80, whichare then in contact, to conductor 81 and thence to blade 82 of thecontrolling switch 83 and thence to contact 84 of said controllingswitch, the blade 82- then being in contact with contact 84 and thenceby conductor 85 to the armature 86 of motor 45, thence by conductor 87to the contact 88, thence to blade 89 of the switch 83, the blade andcontact then being in contact, thence by conductor 90 and thence throughcontacts 91, 92, and 93 of the reversing switch, thence by conductor 94to the blade 95 of the switch 83, thence to contact 96, thence byconductor 97 through the series fields 98 of the motor 45 and thence byconductor 99 to the terminal 100.

A portion of the current passes from the point 73 through the conductor101 to the shunt field coils 98 of the motor 45 and thence to conductor99 and terminal 100. As

the controller for the motor 45 is operated, the contacts 66, 67:68 and69 are successively brought into contact with the contacts 66, 67, 68and 69., and the several sections of the resistance 60 are successivelycut out of the circuit. When the contact 69 engages contact 69 all ofsaid resistance is out of circuit. After the motor 45 is in operation soas to drive the cutter, the motor 15 is started up by actuating thecontroller 102 so as to bring the upper and lower contacts into contactwith their opposed contacts. The circuit will then be traced as follows:from terminal 62 through conductor 63, thence to contacts 64 and 65 ofthe controller 64, thence through contacts 66, 67, 68 and 69 to contact69 (the controller 64 in this case being moved so that all theresistance 60 is out of circuit), thence through conductor 72 toconductor 76, thence through conductor 103 to contact 104 of controller102, thence to contact 105, which at this time is in contact withcontact 104, then through contacts 106, 107, 108, 109 and 110 to contact 111. thence by conductor 116 to resist ance 61, thence by conductor117 to conductor 118. thence to contact 119 of the reversing switch 120of motor 15, thence to contacts 121 and 122, which are now inengagement, thence by conductor 123 to the blade 124 of the switch 83,thence to contact 125, which is now in contact with said blade, thencethrough conductor 126 to the armature 127 of the motor 15, thence byconductor 128 to contact 129, thence to switch blade 130 which is now incontact with contact 129, thence by conductor 131 to contact 132, thencethrough contact 133 to contact 131, thence by conductor 135 to switchblade 130, thence to contact 137, thence by conductor 138 through thefield 139 of motor 15, thence to conductor 99 and terminal 100. As thecontroller 102 is operated contacts 106, 107, 108, and 109 are successiely brought into contact with their opposed contacts 112, 113, 11 4 and115 so as to gradually cut out sections of the resistance 61.

It will be seen that by this construction the motor 15. which feeds thecutter to the coal cannot be operated to so feed said cutter to the coalexcept when the motor 45, which actuates the cutter is in operation, forwhen the controller (31 is moved to disconnect motor 45 from thecircuit, the circuit through the small motor 15 is also broken be 'auscsaid circuit must pass through the controller (51. In view of the factthat the circuit of the small motor passes through the controller (34,it will also be seen that any portions of the resistance ()0 which arein circuit with the motor -15 will also be in circuit with the motor 15.

If it is now desired to connect the motor 15 with the axles of thewheels 2 so as to move the machine from place to place, the clutchmember 27 is moved so as to connect the bevel gear 26 with the motorshaft 25 and the switch 83 is moved to the position shown in Fig. 5. sothat the blades thereof make contact with the contacts 140, 141 and 142.This cuts the motor 45 out of circuit and disconnects the motor 15 fromits con troller 102 and connects it with the controller 61 and theresistance 60 of the motor 45. The circuit will then be traced asfollows: from terminal 62. through conductor (53, thence to contact 64,thence through contacts 65. 66, 67, 68, 69 and 70 to contact 71, thencethrough conductors 72 and 74, thence through the resistance. thencethrough conductor 76 to contact 78. thence through contacts 79 and 80 toconductor 81, thence to switch blade 82 and contact 140. thence byconductor 143 to conductor 126, thence tl'irough the armature of motor15, thence by conductors 123 and 144 to contact 142 and switch blade 89,thence by conductor 90 to contact 91, thence through contacts 92 and 93and conductor 94 to switch blade 95 and contact 141, thence by conductor145 to conductor 138, thence through the fields 139 of the motor 15 andthence through conductor 99 to terminal 100.

It will thus be. seen that the motor 15 is now operated by theresistance 60, and that this resistance may be cut in or out byoperating the controller 64.

I have described in detail a particular construction embodying myinvention, but it is of course evident that the parts may be varied inmany particulars without departing from the spirit of my invention. andI .-therefore do not limit mvself to the particular construction shown.

I claim:

1. A cutting machine comprising a main frame, wheels upon which saidframe is carried, a driving motor adapted to be operatively connectedwith said wheels, a supporting frame movably mounted on the main frame.a cutting element carried by said supporting frame, a cutter forming apart of said cutting element, a motor for actuating said cutter, acontrolling resistance for said cutter actuating motor, means forconnecting the driving motor with said supporting frame so as to move itto feed the cutter toward the material to be cut, a controllingresistance for said driving motor, and means for connecting said drivingmotor with the controlling resistance of the cutter actuating motor whenthe driving motor is disconnected from the supporting frame andconnected with said wheels.

2. A cutting machine comprising a main frame, a supporting f ame movablymounted thereon, a cutting element carried by said supporting frame,said cutting element provided with a cutting devicefor cutting thematerial to be acted upon, a motor for actuating said cutting device, acontrolling resistance for said cutter actuating motor, a controllingswitch for said controlling resistance, a second motor operativelyconnected with said supporting frame so as to move it to feed thecutting device toward the material to be acted upon, a controllingresistance therefor, a controlling switch for said controllingresistance, and means for connecting the controlling switch for thecutter actuating motor in circuit with the second motor, whereby thesecond motor cannot be operated except when the cutter actuating motoris in operation.

3. A cutting machine comprising a cutting device, a motor for actuatingthe cutting'device, a, controlling resistance for said motor, acontrolling switch for controlling said resistance, a second motor formoving said cutting device so as to feed it toward the material to becut. a controlling resist: ance therefor, a controlling switch for saidcont-rolling resistance, and means for connecting said second motor inthe circuit of the controlling switch for the motor for actuating thecutting device. whereby the second motor cannot be operated except whenthe motor for actuating the cutting device is operated.

4. A cutting machine comprising a frame, supporting wheels for saidframe. a cutting device supported on said frame, a motor for actuatingsaid cutting device, a controlling resistance for said motor. a secondmotor for feeding the cutting device toward the material to be cut, acontrolling resistance for In testimony whereof, I affix my signasaidsecond motor, means for connecting and ture in the presence of twowitnesses this 1 disconnecting saild secolrlid motor with szitid 22ndday of April, 1915. wheels so as to rive t em, and means or v 0connecting the second motor in circuit With CHARLES DAVIS the resistanceof the cutter actuating motor Witnesses: when the said second motor isconnected MINNIE. M. LINDENAU, with said wheels. ELLA THIEME.

